Change color of widgets

["Adrian Hoe" <mailbox adrianhoe com>]

Hi,

I am new to this list and am developing some gui application on linux.

My application would require to toggle between day or night mode. When the  
application is in day mode, the widgets will be displayed in normal  
desktop colors. When it is in night mode, the widgets must be displayed in  
another color, e.g. Red on black background.

How can I change the color of the widgets?

Thank you and best regards,
--
"Simplicity is the ultimate sophistication." - Leonardo DaVinci.
"Complexity is simplicity that has failed." - Adrian Hoe, June 23 2004.
http://adrianhoe.com